Sonoff SNZB-02LD IP65 Zigbee with external temperature sensor

The Sonoff SNZB-02LD is a Zigbee-enabled temperature sensor with an LCD display and external probe, specially designed for precise measurements in liquids or hard-to-reach enclosed spaces. The 2.2″ LCD screen clearly and legibly displays temperature values in real time, while the 1.5 m stainless steel probe allows measurements in locations that conventional sensors cannot reach. Thanks to IP65 certification, the device operates reliably even in humid or splash-prone environments (it should not be fully submerged in water or exposed to a strong water jet). The thermometer measures temperatures with high precision of ±0.5 °C, ensuring stable and reliable readings. Via the Zigbee 3.0 wireless protocol, the SNZB-02LD connects seamlessly with common smart home hubs and gateways (e.g., Sonoff iHost, NSPanel Pro, or Amazon Echo). In the eWeLink app, temperature trends can be viewed by day, week, or month; up to 180 days of historical data is stored in the cloud and can be exported as charts. Additionally, automations are possible: Depending on thresholds, scenes can, for example, turn heaters or fans on or off, and notifications are received for unusual temperatures. Even voice assistants like Alexa or Google Assistant can be integrated to query the current temperature by voice command, provided the sensor is integrated via a Zigbee hub. The SNZB-02LD is powered by a replaceable CR2477 button cell, which allows flexible, wireless use. With its compact design and robust construction, the device is ideal for temperature monitoring in water tanks, refrigerators, aquariums, greenhouses, or other applications where reliable and accurate temperature control is required.

Recommended Accessories:

• Sonoff Dongle Max Zigbee and Thread PoE Dongle

Features:

• The sensor measures temperatures precisely via a 1.5 m long, detachable stainless steel probe, making it suitable for liquids and hard-to-reach areas.
• It is fully compatible with Zigbee2MQTT, Home Assistant, and Zigbee 3.0 hubs like Sonoff iHost, NSPanel Pro, or Echo (4th Gen).
• The 2.2″ LCD display shows temperature values clearly and in real-time, updates every 5 seconds, and supports °C/°F switching.
• Its IP65 housing reliably protects against dust and water jets, allowing use in humid environments.
• The eWeLink app stores up to 180 days of measurement history, offers charts, and allows exporting data as CSV.
• The sensor supports smart home automations and voice control via Alexa and Google Assistant.

Application Examples:

• Temperature measurement of liquids in containers like water tanks or oil drums.
• Monitoring the temperature in enclosed spaces, such as refrigerators, incubators, or pantries.
• Controlling the water temperature in aquariums for optimal conditions for fish and plants.
• Automatically switching heating or cooling devices via smart home scenes at defined temperature limits.
• Temperature monitoring in special applications like wine storage or greenhouses.

Documentation:

• User Manual and Technical Data
• Zigbee2MQTT

Technical Data:

• Manufacturer: Sonoff
• Manufacturer SKU: SNZB-02LD
• Display: 2.2 inch LCD
• Protocol: Zigbee 3.0 (IEEE 802.15.4)
• Display: Selectable in °C/°F
• Battery: CR2477 (3 V Lithium button cell)
• Temperature Measurement Range (Probe): –40 °C to +115 °C
• Operating Temperature (Device): –10 °C to +60 °C
• Operating Humidity: 0–100% RH
• Accuracy: ±0.5 °C
• Protection: IP65
• Color: White
• Cable Length: 1.5 m
• Certification: CE, FCC, RoHS
• Material: PC+ABS (Housing), Stainless Steel 304 (Probe)
• Dimensions: 63 × 59 × 22 mm
• Weight: 117g

Scope of Delivery:

• 1× Sonoff SNZB-02LD IP65 Zigbee with external temperature sensor
• 1× Lanyard
• 1× Reset Needle
• 1x Velcro Strip for Mounting the Sensor
• 1× User Manual